Microsoft Roll Back Windows App Facebook Beta Version 10.1 Update

Facebook Beta has namely received another update, thus making
Windows 10 Mobile rather puny jump to version
10.0.6.0.

The changelog reads short and crisp:

Improvements in the synchronization of the contacts

Other bug fixes

Yet something odd regular Facebook app for Windows 10 Mobile:

Once the app was surprisingly received an update to version
10.1 a few weeks ago (and had thus taken the new design of the Beta version),
this was after a while no longer available, but was already in early December sighted again in the store.

Now it seems curiously disappeared again from the store:
There is in fact currently playing only Facebook Beta Version 10.0.6.0.